tailieunhanh - Mechanical Engineer´s Handbook P54

Fig. Flow diagram. These handling methods are implemented individually, or in combination, by commercially available material-handling equipment types. MATERIAL-HANDLING EQUIPMENT CONSIDERATIONS AND EXAMPLES 3 . . Developing the Plan 851 Once the material-handling problem has been identified and the relevant data have been collected and analyzed, the next step in the design process is to develop a plan for solving the problem. This usually involves the design and/or selection of appropriate types, sizes, and capacities of materialhandling equipment. In order to properly select material handling equipment, it must be realized that in most cases, the solution to the problem. | MATERIAL-HANDLING EQUIPMENT CONSIDERATIONS AND EXAMPLES 1225 These handling methods are implemented individually or in combination by commercially available material-handling equipment types. MATERIAL-HANDLING EQUIPMENT CONSIDERATIONS AND EXAMPLES Developing the Plan Once the material-handling problem has been identified and the relevant data have been collected and analyzed the next step in the design process is to develop a plan for solving the problem. This usually involves the design and or selection of appropriate types sizes and capacities of materialhandling equipment. In order to properly select material handling equipment it must be realized that in most cases the solution to the problem does not consist merely of selecting a particular piece of 1226 MATERIAL HANDLING t FrorrK A B C D E F G A 13 37 69 85 57 33 B 13 21 53 69 41 17 C 37 21 29 45 17 41 D 69 53 29 13 33 57 E 85 69 45 13 49 73 F 57 41 17 33 49 21 G 33 17 41 57 73 21 A Fig. From-to chart. hardware such as a section of conveyor. Rather handling should be viewed as part of an overall system with all activities interrelated and meshing together. Only on this basis can the best overall type of equipment or system be planned. This section provides examples of some of the more common types of unit load material handling and storage equipment used in production facilities. Conveyors Conveyors are generally used to transport materials long distances over fixed paths. Their function may be solely the movement of items from one location in a process or facility to another point or they may move items through various stages of receiving processing assembly finishing inspection packaging sortation and shipping. Conveyors used in material handing are of two basic types 1. Gravity conveyors including chutes slides and gravity wheel or roller conveyors that essentially exploit the use of gravity to move items from a point at a relatively high elevation to another point at a lower